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5 social media sites you (probably) haven’t heard about

The time between introduction and adoption on social media is growing ever shorter. For instance, it took a year or more before the words “Twitter” and “fad” were no longer synonomous. Now, a social media site like Quora launches and within months people are declaring in the next Twitter.

So, in the spirit of hype, here are five more sites that could make something of themselves.